The Atlantic Cities dug into the data to find the U.S. cities where cycling is most popular among commuters. The far-and-away winner is Davis, CA, population 66,000, where nearly 20 percent of commuters get to work by pedal power. Boulder, CO comes in second with just over 12 percent of its commuters cycling, and Palo Alto, CA comes in third at 9.5 percent per cyclist.

Compare that to Portland, OR, the most bike-oriented among big U.S. cities—it charts a mere 6 percent of commuters riding bicycles to work.